diff --git a/package-lock.json b/package-lock.json
index 43fbc1a..ef0cfa3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "string-ts",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "string-ts",
-      "version": "0.3.1",
+      "version": "0.4.0",
       "license": "MIT",
       "devDependencies": {
         "eslint": "latest",
diff --git a/package.json b/package.json
index afe7d4f..8b5fc62 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "string-ts",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Strongly-typed string functions.",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",